Gas-compressor-driving mechanism.



G W. MILES.

GAS COMPRESSOR DRIVING MECHANISM.

APPLIOATEON FILED JULY 23,1913.

1,096,790,, Patented May12,191

, similar structures.

citizen of the 'ing heads, and one of the eccentric. plates re- "iinirnii snares rn'rnnr orricn.

CASPER W. MILES, 03C ANDERSON TOKVNSHIP, HAMILTON COUNTY, OHIO, ASSIGNGR T0 STEPHEN S. MILES,

OF GREENSBORO, NORTH CAROLINA.

GAS-COMPRESSOR-DRIVING MECHANISM.

Specification of Letters Patent.

Patented May 12, 1914.

Application filed July 28, 1913. Serial No. 780,701.

To all whomr'z 'mcg concern;

Be it known. that I, Casrnn W. Mines, :1 United States, rcsidiin; in Anderson township, in the county of Hamilton and State of Ohio, have invented certain new and useful Improvements in Gas-- Con'ipressor-Driring ivlechanism, of which the following is a specification My invention relates to ii'nprovemcnts in the driving connections between the shaft anclplungcr of air or gas conmressors and One of its objects is to provide improved mechanism to transmit motion from the driving shaft to the plunger. and which provides wearing surfaces of large area and which can be relied upon when not readily accessible to perform their functions for long periods without attention.

Another object is to provide for rcstorhn; the connecting i'ucclumism to working condition by'thc sulistilulifin ot' a new part in place of a Worn or defect ive one, and which is readily detachable for that purpose.

Another object is to provide straight driving shafts with reliable and efficient means to take the place or act as a substitute for crank shafts heretofore extensively employed.

My invention also comprises certain details of form, combination and arrangement, all of which wilLbe fully set forth in the description of the accompanying drawings in which:

Figure 1 is a side elevation, partly in section of a gas COII'IPI'GSSCII with one of the cas moved, and embodying my invention. Fig. 2 is a central vertical section on line i) q) of Fig. 1. Fig. 3 is a perspective view of the pitman detached. Fig. 4 is a perspective View of a detachable bearing band orming.

The accompanying drawings represent the preferred embodiment of my invention in Which A represents the louse or frame of a gas compressor, and B represents the cylinder preferably provided with a water jacket 2. The casing A. is provided with openings 3 and 4 at opposite sides. which openings are fitted with detachable caps and 6. The cap 5-is provided with a bearing for the driving shaft 1) and. a stalling box 8 and gland 9 to prevent leakage around the shaft to or from the casing. The cap (5 is pr0- virled with a blind bearing 10 to receive the opposite end of the shaft. A. pulley, not shown outside the cap 5, is preicrably employed to drive the shaft I). I

Ivlounled upon the shaft I) between the bearings 7 and 10 an eccentric in two parts 11 and 12. The shaft is preferably tapered and drawn into a tapered bore in the eccentric by means of a nut lll threaded upon the shall. i. also preferably provide a key 15 to lock the eccentric to the tapered poi-lion of the shaft. ither means may be employed if desired to firmly lock the eccentric to the shall. One or more spacin collars l6 and 17 are employed to centrally locate the ccccnlric with reference to the casing and cylinder, and to prevent end play of the shaft. The eccentric member 12 has a peripheral bearing face 18 eccentric to the shaft axis and a flange 19 at one side of said hearing; face. The eccentric member or plate 11 has a flange 27 at the opposite side of the bearing face 18, and is detachably connected to the member 12 by means of bolts or screws 20.

'lhe pitman or connecting rod 522 is otally connected to the of a pin 24, and at its opposite end has a large bore 25 which is of somewhat greater diameter than that of the bearing face 18. idetachablc ring or band 26 is interposed between the faces of the bore 25 and the lJtlll'lllQf face 18 so as to closely lit both faces and so that sliding movement may take place either ljict'wcen the band and the pilman or between the hand and the eccentric. When the band and pitman are in place upon the eccentric as illustrated in Fig. 2, the flanges l9 and 27 ser pitman in place with reference to the cccenve to hold both the band and tric. The band .26 may be of hardened steel,

or of other material depending upon the service required, and is preferably ground to accurately fit the exterior of the eccentric and the bore of the pitman. The band presents two wearing surfaces of exceedingly large area, and may be extensively used for long periods without wearing suiiicicntly to cause lost motion and consequent knocking or pounding. A straight shaft may he cn'iploycd which is not liable to twist or break under heavy strain. and when wcru or defective the hand may be readily detached and a new one substituted.

in practice the gas mav be tak n into the i in the plunger and compressed in the cyleccentric allixed to the shaft and in bearing index, as disclosed for instance in my former Patent No. 878,483, elated Feb. 4, 1908. A quanlity of lubricating oil is located in lhe lower portion of the casing into which the eccentric, the band :26, and the lower portion of the pitman dip to keep said parts and also the shaft bearings lubricated. I also preferably provide a curved channel or convergin tube 30 carried by the eccen tric which ips, large end first, into the lubricant as the eccentric rotates so as to cause a fine jet or spray to issue from the smaller end of said-tube and directed toward the plunger and cylinder Walls, which serves to keep the cylinder Walls and upper end of the pitman lubricated. if desired the band 26 may be tightly fitted to or locked to either the pit-man or the eccentric, so as to have only one sliding or Wearing surface.

The mechanism herein illustrated is capable 'of COHSldl-Bfitblfi modification without departing from the principle of my invention.

Having described my invent-ion, what I claim is:

1. loan apparatus of the class set. forth, a cylinder, a casing ailixed to the open end thereof, said casing being provided with detachable heads at opposite sides thereof, said heads being provided with inwardly ex tended bearings and one of said bearings provided with a stuffing box, a straight shaft. extending through said stnfiing box and supported in said respective bearings, a divided women engagement at opposite sides with the inner ends of the respective bearings, a pitman having a strap at one end in engagement; with the eccentric and a piston connected to the other end of said pitnlan, to enable said shaftand eccentric to be detached from the pitman and removedthrough the openings in said casing.

2. In an apparatus of the class set forth, a cylinder, a casing aflixed to'the open end thereof, said casing being provided with detachable headset opposite sides thereof, of these beads being provided with an inwardly extending blind bearing and the other head being provided with an inwardly extending stulling box, e straight shaft extending throu 'h the stalling box and having its inner ends inserted in said blind bearing, an eccentric device afiixed to the shaft and having' its opposite sides in bearing engagement with the inner ends of the respective bearings, a pit nan having a strap at one end in engagement with the eccentric and a piston connected to the other end of the pitman, said eccentric device embodying a hub member engaging; the shaft, a sidenicmber formed integral with the hub member, a removable side member, and a removable antifriction band held by said side members re movably in place between the eccentric and the pitman strap.

In testimony whereof .I have aflixed my signature in presence of two witnesses.

CASPER l/V. MILES. Witnesses B. iii. Knows, W. Tnonn'ron lloesa'r. 

